气候变化领域集成服务门户(CCPortal): Aerosol Effects on Lightning Characteristics: A Comparison of Polluted and Clean Regimes

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DOI	10.1029/2019GL086825
	Aerosol Effects on Lightning Characteristics: A Comparison of Polluted and Clean Regimes
	Liu Y.; Guha A.; Said R.; Williams E.; Lapierre J.; Stock M.; Heckman S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:9
英文摘要	Oceanic lightning can be a sensitive indicator of aerosol effects on lightning characteristics as thermodynamic contrast is indistinct over adjacent oceanic regions. The study presents discernable aerosol impacts on lightning characteristics by analyzing 2 years (2017–2018) of intracloud (IC) and cloud-to-ground (CG) lightning data from Earth Networks Total Lightning Network over two key regions in southern South China Sea. Mean stroke density, IC/CG ratio, +IC fraction, and +CG fraction in polluted conditions are respectively 3.7, 2, 1.2, and 5.8-fold larger than unpolluted counterparts. Total stroke contrast is further confirmed with the GLD360 network. Thermodynamic parameters conversely support slightly stronger convection over clean ocean. Clear evidence shows cloud droplet size diminishes with added aerosol. Aerosol invigorates more frequent and robust mixed-phase development, endowing maritime convection with continental characteristics. Modifications in the charge reversal temperature and lower and upper positive charge regions are speculated on as means for stimulating more positive ICs and CGs. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Aerosols; Integrated circuits; Lightning; Cloud-to-ground lightning; Lightning characteristics; Maritime convection; Positive charges; Sensitive indicator; Southern South China Sea; Thermodynamic parameter; Total lightning; Clouds; aerosol; air temperature; atmospheric convection; cloud droplet; cloud to ground lightning; comparative study; droplet; electrical property; parameterization; thermodynamics; Pacific Ocean; South China Sea
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170426
作者单位	Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China; Department of Physics, Tripura University, Agartala, Tripura, India; Vaisala Inc., Louisville, CO, United States; Earth Networks, Germantown, MD, United States
推荐引用方式 GB/T 7714	Liu Y.,Guha A.,Said R.,et al. Aerosol Effects on Lightning Characteristics: A Comparison of Polluted and Clean Regimes[J],2020,47(9).
APA	Liu Y..,Guha A..,Said R..,Williams E..,Lapierre J..,...&Heckman S..(2020).Aerosol Effects on Lightning Characteristics: A Comparison of Polluted and Clean Regimes.Geophysical Research Letters,47(9).
MLA	Liu Y.,et al."Aerosol Effects on Lightning Characteristics: A Comparison of Polluted and Clean Regimes".Geophysical Research Letters 47.9(2020).